improvment: drop screen builder for link

lib/main.dart

@@ -5,6 +5,7 @@ import 'package:git_touch/models/auth.dart';
 import 'package:git_touch/models/theme.dart';
 import 'package:git_touch/screens/commits.dart';
 import 'package:git_touch/screens/credits.dart';
+import 'package:git_touch/screens/gitlab_issue.dart';
 import 'package:git_touch/screens/gitlab_todos.dart';
 import 'package:git_touch/screens/gitlab_user.dart';
 import 'package:git_touch/screens/issue_form.dart';
@@ -229,7 +230,7 @@ void main() async {
     codeModel.init(),
   ]);
 
-  // TODO: gitlab
+  // github
   themeModel.router.define('/login', handler: Handler(
     handlerFunc: (context, params) {
       return LoginScreen();
@@ -309,6 +310,14 @@ void main() async {
     },
   ));
 
+  // gitlab
+  themeModel.router.define('/project/:id/issue/:iid', handler: Handler(
+    handlerFunc: (context, params) {
+      return GitlabIssueScreen(
+          int.parse(['id'].first), int.parse(params['iid'].first));
+    },
+  ));
+
   runApp(MultiProvider(
     providers: [
       ChangeNotifierProvider(create: (context) => notificationModel),

lib/screens/gitlab_todos.dart

@@ -3,7 +3,6 @@ import 'package:git_touch/models/auth.dart';
 import 'package:git_touch/models/gitlab.dart';
 import 'package:git_touch/models/theme.dart';
 import 'package:git_touch/scaffolds/refresh_stateful.dart';
-import 'package:git_touch/screens/gitlab_issue.dart';
 import 'package:git_touch/utils/utils.dart';
 import 'package:git_touch/widgets/avatar.dart';
 import 'package:git_touch/widgets/link.dart';
@@ -25,9 +24,8 @@ class GitlabTodosScreen extends StatelessWidget {
           crossAxisAlignment: CrossAxisAlignment.stretch,
           children: data.map((item) {
             return Link(
-              screenBuilder: (_) => GitlabIssueScreen(
-                  item.target.projectId, item.target.iid,
-                  isMr: item.targetType == 'MergeRequest'),
+              url:
+                  '/project/${item.target.projectId}/${item.targetType == 'MergeRequest' ? 'merge_requests' : 'issue'}/${item.target.iid}',
               child: Container(
                 padding: CommonStyle.padding,
                 child: Row(

lib/screens/object.dart

@@ -5,7 +5,6 @@ import 'package:git_touch/graphql/github_object.dart';
 import 'package:git_touch/models/code.dart';
 import 'package:git_touch/models/theme.dart';
 import 'package:git_touch/scaffolds/refresh_stateful.dart';
-import 'package:git_touch/screens/code_theme.dart';
 import 'package:git_touch/widgets/action_entry.dart';
 import 'package:git_touch/widgets/app_bar_title.dart';
 import 'package:git_touch/widgets/markdown_view.dart';
@@ -102,10 +101,11 @@ class ObjectScreen extends StatelessWidget {
             return ActionEntry(
               iconData: Octicons.settings,
               onTap: () {
-                if (data != null) {
-                  Provider.of<ThemeModel>(context).pushRoute(
-                      context, (_) => CodeThemeScreen(blob.text, _language));
-                }
+                // TODO:
+                // if (data != null) {
+                //   Provider.of<ThemeModel>(context).pushRoute(
+                //       context, (_) => CodeThemeScreen(blob.text, _language));
+                // }
               },
             );
           default:

lib/widgets/link.dart

@@ -7,25 +7,20 @@ import 'package:git_touch/models/theme.dart';
 class Link extends StatelessWidget {
   final Widget child;
   final String url;
-  final WidgetBuilder screenBuilder;
   final Function onTap;
   final VoidCallback onLongPress;
 
   Link({
     this.child,
     this.url,
-    this.screenBuilder,
     this.onTap,
     this.onLongPress,
-  }) : assert(screenBuilder == null || url == null);
+  });
 
   void _onTap(BuildContext context) {
     if (onTap != null) {
       return onTap();
     }
-    if (screenBuilder != null) {
-      return Provider.of<ThemeModel>(context).pushRoute(context, screenBuilder);
-    }
     if (url != null) {
       if (url.startsWith('/')) {
         Provider.of<ThemeModel>(context).push(context, url);